Stephen g



(No Model) 'S. G. HUTGHINSON.

PILE.

No. 365,816. Patented J111y5, 1887.

Ina/670%;

UNITED STATES PATENT OFFICE.

STEPHEN G. HIlTOI-IINSON, OF COLUMBUS, OHIO.

SPECIFICATION forming part; of Letters Patent No. 365,816, dated July 5, 1887.

Application filed December 20, 188d. Serial No. 222,123. (No model.)

To all whom it may concern:

Be it known that I, STEPHEN G. HUTGHIN- SON, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented a certain new and use ful Improvement in Piles, of which the following is a specification.

My invention relates to the construction of iron piles, such as are intended to be driven into the earth, to be used in the formation of substructures, and particularly relates to an improvement in iron piles for which Letters Patent No. 272,426 were granted to Richard Gray and Benjamin B. Abbott under date of February 20, 1883.

The objects of my invention are, first, to provide a pile of the class mentioned of great strength and durability and of simple construction; second, to so construct a hollow pile as to prevent the entrance of moisture, water, &c., and thus prevent the possibility of injury to the pile by frost; third, to prevent separation in case of a crack or fracture in the outer wall of a pile. These objects I accomplish in the manner illustrated in the accompanying drawings, in which-- Figure 1 is an elevation of my improved pile. Fig. 2 is a transverse section of the same, taken on line 00 a: of Fig. 1; and Fig. 3 is a vertical longitudinal section taken through the center of said pile.

Similar letters refer to similar parts .th roughont the several views.

A represents my improved pile, which consists of a hollow metallic portion, b, having projecting outwardly from its outer surface at equidistant points thereon a number of longitudinal flanges, c. The central hollow portion, b, which is preferably formed of castiron, has its lower end made solid and tapering. Placed vertically within the center of thehollow of the portion 1) is a metallic rod, d, of a length corresponding with the length of the hollow of said central portion. I prefer to form this rod (Z of wrought-iron; but it may be, however, made of any other wellknown suitable metal. The space remaining within the hollow of the pile between the in-- nor surface thereof and the outer surface of the rod d is filled with concrete, asphaltum, or other well-known similar material, f, which greatly enhancing the transverse strength of the pile, and that in case the cast-iron central portion, 1), should become cracked or broken the solid core formed by the concrete or other filling and central metallic rod, (1, will operate to hold the parts so broken one above the other in their proper position, thus safely sustaining the weight placed upon the pile and affording an opportunity to repair the same before damage may occur therefrom to other parts of the structure which may be connected therewith. It will also be seen that, the hollow portion of the pile being provided with a solid core, the entrance of water or moisture is prevented.

I am aware that hollow supportingcolumus have been formed heretofore, and that they hzWe been provided with separate compartments filled with similar compounds. I-Iowevcr, these columns are not constructed or designcd to accomplish the objects herein mentioned.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. An iron pile having its central portion, A, hollow, and having within its hollow portion a central metallic rod, d, surrounded by concrete, asphaltum, or other well known suitable material, substantially as and for the purpose specified.

2. In an iron pile, the combination of the central hollow portion, A, having its lower portion pointed and formed solid, and having longitudinal radial flanges c, in combination with the internal rod, d, and filling f, substantial] y as and for the purpose specified.

STEPHEN G. HUTOHINSON.

- Witnesses:

G. R. GILMOUR, E. HUTOHINSON. 

